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- 1 Atkinson Dr, Ludington, MI 49431
About Dr. Marcus
Keith Marcus, MD is a hospitalist practicing in Ludington, MI. Keith trained at University of Iowa, Rj & L Carver College of Medicine, graduating in 1985. Keith is also listed as specializing in internal medicine. Medicare claims data shows Keith provided 223 services to 172 patients. The services billed most often include subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes, and hospital discharge day management, more than 30 minutes. This provider record is associated with NPI 1255371365.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (616) 391-3139
- Email not available
Practice Locations
1 ATKINSON DR
Ludington, MI 49431
Conditions Commonly Evaluated or Treated
Within Hospital Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Allergic Reactions
- Severe Allergic Reaction
Blood Clots
- Blood Clot in Lung
Blood Disorders
- Sickle Cell Pain Crisis
Brain & nerves
- Alcohol withdrawal
- Delirium
- Fainting and syncope
- Meningitis
- Transient ischemic attack
Brain & Nerves
- Status epilepticus
Breathing & lungs
- Community-acquired pneumonia
- COPD flare-up
- Fluid around the lungs
- Severe asthma attack
Digestive health
- Acute gallbladder inflammation
- Acute pancreatitis
- Ascites
- Bowel obstruction
- C. diff diarrhea
- Severe diverticulitis flare-up
- Stomach or intestinal bleeding
Emergencies
- Drug overdose or poisoning
Endocrine
- Dangerously High Calcium
General medical
- Hip fracture medical care
- Low sodium or electrolyte imbalance
- Post-surgery fever or infection
- Severe dehydration
- Short stature and growth concerns
Heart & Circulation
- A-Fib Flare-Up
- Heart Attack Inpatient Care
- Shock
Heart & circulation
- Dangerous high blood pressure
- Deep vein thrombosis
- Heart failure flare-up
- Severe anemia
- Supraventricular tachycardia
- Unexplained chest pain
Hormones & diabetes
- Dangerous high blood sugar
Infections
- Bone infection
- Cellulitis
- Complicated Bladder Infection
- Flesh-Eating Infection
- Infective endocarditis
- Sepsis or blood infection
- Severe COVID-19 illness
- Severe flu illness
Kidney & urinary
- Acute kidney injury
- Kidney infection
Liver & Digestive
- Hepatic encephalopathy
- Severe Fecal Impaction
- Sudden Liver Failure
Lung Infections
- Hospital-Acquired Pneumonia
- Severe Pneumonia
Lungs & Breathing
- Respiratory failure
Nutrition
- Severe Malnutrition In Hospital
Procedures & services
Access & tubes
- Arterial catheter placement
- Central line placement
- Feeding or stomach tube insertion
- PICC line placement coordination
- Urinary catheter insertion
Addiction Medicine
- Inpatient Opioid Withdrawal Induction
Airway & Breathing
- Emergency intubation
- Tracheostomy care
Breathing support
- BiPAP or CPAP therapy
- Breathing machine management
- Oxygen therapy
Critical Care
- Continuous IV Sedation Management
- CPR and defibrillation
- Rapid Response Team Call
Diagnostic procedures
- Emergency ultrasound
- Hospital heart rhythm monitoring
- Lumbar puncture
- Swallowing safety evaluation coordination
Diagnostic Testing
- Blood Culture Workup
Draining fluids
- Draining lung fluid
- Paracentesis
Emergency Care
- Blood Thinner Reversal
Heart Procedures
- Bedside Heart Ultrasound
- Electrical cardioversion
Hospital services
- Alcohol detox monitoring
- Comfort care transition
- Fall risk assessment
- Hospital admission
- Hospital discharge planning
- Hospital observation care
- Hospital wound and bed sore care
- Inpatient dialysis coordination
- Inpatient physical therapy evaluation
- Medication management
- Post-surgery hospital recovery care
- Pre-surgery medical clearance
- Rehab or nursing home placement evaluation
- Specialist consultation coordination
Joint Procedures
- Joint injection or aspiration
Kidney Care
- Inpatient Peritoneal Dialysis Care
Lung Procedures
- Chest tube insertion
Medication & fluids
- Blood sugar insulin drip
- Blood thinner drip management
- Blood transfusion
- IV antibiotic treatment
- IV electrolyte replacement
- IV fluids
- Patient-Controlled Analgesia (PCA) Setup
Mental Health
- Medical-Psychiatric Inpatient Evaluation
Neurological Care
- Continuous Neurological Checks
- Emergency Stroke Response
Nutrition Support
- IV Nutrition For Preemies
Rehabilitation
- Inpatient Occupational Therapy Evaluation
Urinary Care
- Continuous Bladder Irrigation
Procedures Most Often Billed to Medicare
223 services · 172 patients · 6 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician | Treatment | 93016 |
20 | Less often than most peers in Hospitalist |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
78 | Less often than most peers in Hospitalist |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
55 | Less often than most peers in Hospitalist |
| Hospital discharge day management, more than 30 minutes | Office visit | 99239 |
44 | Less often than most peers in Hospitalist |
| Hospital discharge day management, 30 minutes or less | Office visit | 99238 |
13 | Less often than most peers in Hospitalist |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
13 | Less often than most peers in Hospitalist |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Trained at University of Iowa, Rj & L Carver College of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1985 at University of Iowa, Rj & L Carver College of Medicine 8
Providers who graduated from the same medical school in the same year.
More connections — 3 related providers in 1 group
Also performs Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician 3
Providers in MI who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Marcus?
Dr. Marcus is a hospitalist in Ludington, MI. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Dr. Marcus's address?
Dr. Marcus is listed at 1 Atkinson Dr, Ludington, MI 49431. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Marcus?
The number on file is (616) 391-3139. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Marcus?
Dr. Marcus's National Provider Identifier is 1255371365. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Marcus train?
Dr. Marcus attended University of Iowa, Rj & L Carver College of Medicine, graduating in 1985. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Marcus have?
Dr. Marcus has 41 years experience. Calculated from a graduation year of 1985, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Marcus perform?
According to Medicare billing data, Dr. Marcus provides treatments such as exercise or drug-induced heart stress test with electrocardiogram with supervision by physician, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Marcus's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Marcus. If this is you, claiming it is free.
Guide.md
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